Jacob klae



(ModeL) ,J. KLAR.

DESK.

, ATTORNEYS.

Lilhogriphlr. wnmn m. n. q

UNITED STATES PATENT OFFICE.

JACOB KLAR, OF RODNEY, MISSISSIPPI.

DESK.

SPEQIPICATION forming part of Letters Patent No. 297,940, dated April29, 1884.

' Application filed October 10, 1883. (Model.)

justing the same vertically to suit the requirements of persons ofdifferent heights, and for sitting or standing at the desk or table, allas hereinafter fully described.

Reference is to be had to the accompanying drawings, forming part ofthis specification,

in which similar letters of reference indicate corresponding parts inall the figures.

Figure 1 is an end elevation of a verticallyadjustable desk, with topbroken off, arranged in accordance with-my invention, and being elevatedfor use by a person standing. Fig. 2 is an end elevation of the sameadjusted for a sitting person. Fig. 3 is partly a front elevation andpartly a sectional elevation, and Fig. 4 is a detail in plan View.

The permanent bench consists of the legs a, cross-bars b, andconnecting-rod c, which may be made in any approved form,and constructedof suitable height to support the desk or table top d sufficiently lowdown for use by a person sitting in a chair.

On the center of the cross-bar b of each end of the frame I fix anupright standard, 6, having a slot, f, extending nearly the wholelength, and also having a toothed bar, 9, attached to one side andranging along the slot. These standards 6 rise about as high as thetable or desk top is to be elevated, and extend through verticalopenings of the same, for guides and supports to the said top inshifting up and down.

To the top of each post a, I pivot a curved arm, h, making a pair ofsaid arms for each end of the table or desk, which overlap each other,and the said arms have a curved slot, 2'. The shaft j passes through allof said slots, said shaft extending from end to end of the desk ortable, and also passing through the slots f of the vertical supports 6,and gearing at each end by a toothed pinion, k, with the toothed racks gon the standards e, so that with a crank applied to one end of the shaftthe desk or table top may be raised or lowered, according as the shaftis turned one way or the other, and the pinions are made to run up ordown the toothed racks, thereby carrying and swinging the curved arms h,on which the desktop rests. A hook-pawl, Z, is pivoted to the desk-topto drop into the notches of one of the pinions k, to hold the desk atany desired height. The pawl is to be raised out of the notches by handwhen the desk is to be shifted. When the desk is raised to thehighestposition, the top extends a little above the top of the standards e, sothat it is desirable to cover the openings in the top for said standardsin case the desk is to be used much in that position,

for which I have .provided the hinged covers m up through the openings.-The arms h are connected across the bench from end to end by stay-rodsn, said rods connecting the pivoted ends of the two arms of therespective sides of the bench, so that the arms are more substantiallyfixed and the action of the arms is more uniform than it would be if notthus connected.

An important advantage of my improved desk constructed as abovedescribed is the facility with which the parts may be disconnected forpacking away in small space, and for transportation, and the ease ofassembling them again inoperative connection.

Having thus described my invention, I claim as new and desire to secureby Letters Patent-- 1. The combination of the curved, slotted, andjointed arms h, shaft j, and pinions 7a with the desk or tablesupporting bench, the top (1, and the vertical slotted standard 6,having toothed racks g, substantially as described.

2. The bench consisting of legs a, crossbars b, and connecting-rod 0,and having the curved slotted arms h pivoted to it, and the verticalslotted standards 6 attached to the cross-bars, in combination with thedesk or table top d, and means, substantially as described, for shifting,it and supporting it thereon at any desired height, as set forth.

3. The combination, with the supportingbench provided with standards e,of the table or desk top d, provided with vertical open- Too ings ateach end, extending through the same, posts a, and the stay-rods n, incombination and formingrgnides for the said standards, and with theslotted standards c,'desk-t0p d, shaft 10 the covers an, hinged to theupper surface of j, pinions 7c, and the toothed bars 9, substansaid top,substantially as herein shown and tially as described.

5 described,wherebytheopenings may beclosed JACOB KLAR.

when the desk is raised to its highest posi- W'itnesses: tion, as setforth. JAMES H. Bmnss,

4. The slotted curved pivoted arms 71, the HENRY L. WIN'rEns.

